function add()
 {
     if (!empty($_POST)) {
         //通过数据模型 将提交的数据整合以便将所有字段插入数据表中
         $auth_M = new \Model\AuthModel();
         $t = $auth_M->auth_save($_POST);
         if ($t) {
             $this->success('添加成功', U('showlist'));
         } else {
             $this->success('添加失败,请重试', U('showlist'));
         }
     } else {
         $info = $this->getInfo();
         $authinfo = array();
         foreach ($info as $k => $v) {
             $authinfo[$v['auth_id']] = $v['auth_name'];
         }
         $this->assign('authinfo', $authinfo);
         $this->display();
     }
 }